[Metalad]

To be honest the best thing i have done is 4.10 diff gears, i have a 302 with a 6 speed manual huge cams and harder valve springs, billet oil pump and the usual exhaust and intake upgrades making 301 rwkw, it was all nice enough until the diff gears went in and then it really freed up and came alive. they may not be for everyone, if you do hwy everyday prob not great but i use mine everyday in stop start traffic and its better on fuel not worse in that situation. i paid 580 for spicer gears and 1200 to have them fitted.

Oh and FNP i had the same issue with my gearbox not going into first sometimes, i put the penrite gearbox oil in and it has almost never done it since.